Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Muscoy
Finding a general contractor in Muscoy who understands county permitting, acreage logistics, and the reality of older Inland Empire homes isn’t always straightforward. We’re Daly City Construction, and we’ve spent years working on exactly the kind of projects Muscoy homeowners face: additions on generous lots, detached shops, garage conversions, and the legalization of unpermitted owner-builder work. If you’re planning a remodel or addition in the 92405 ZIP code, call us at (866) 505-5254 for a free estimate. Noel Cabrera runs our team, and he’ll be the one making sure your project is scoped correctly from the first site visit, not the tenth.
Why Daly City Construction Is Muscoy’s Preferred General Contractor Company
Muscoy is unincorporated San Bernardino County, and that changes how every project gets permitted, inspected, and priced. We’ve worked enough jobs here to know that a county permit search comes before anything else, and that what we find often reshapes the scope. Homeowners in Muscoy have told us they’d rather work with a contractor who already knows the county building department, the setback rules for wells and septic systems, and how to handle an addition that was never permitted the first time around.
Our reputation in the Muscoy area is built on showing up, doing the as-built research, and being straight about what a project will actually cost. When a homeowner off California Street calls us about a detached shop or an ADU, we’re able to get to the property quickly, walk the lot, and come back with a line-item quote that accounts for grading, drainage, material hauls, and permitting. No vague allowances that mysteriously grow later.
We’re a full-scope General Contractor team, which means one point of contact from the initial county permit check through final inspection. That matters in Muscoy, where projects frequently involve correcting prior owner-builder work before new construction can start.
Styles & brands we work with







Licensed General Contractor in Muscoy
A Licensed General Contractor in Muscoy handles the entire project: permits, county inspections, subcontractors, material ordering, and the work itself. Because Muscoy falls under San Bernardino County jurisdiction rather than a city building department, the permit path is different from what homeowners in Rialto or San Bernardino experience. We pull the permits, schedule the inspections, and manage the corrections when something from a previous owner-builder job doesn’t pass.
Permit Search and Legalization Work
The first thing we do on any Muscoy project is run a county permit search. It’s common to find that a patio was enclosed, a garage was converted, or a room was added without permits. When that happens, the job becomes two jobs: legalize the existing structure through as-built drawings and corrections, then build the new scope. We handle both, and we price both upfront so there’s no surprise change order after demolition starts.
Scoping Additions on Larger Lots
Muscoy lots are often generous, which gives homeowners room for additions, detached shops, and ADUs. But acreage brings its own costs: longer material hauls, equipment access across open ground, and well and septic setback requirements that can push a structure further from the house than you’d expect. We scope these logistics during the estimate, not after the contract is signed.
Residential General Contractor in Muscoy
A Residential General Contractor in Muscoy works on single-family homes, detached garages, shops, and accessory structures on residential parcels. Most of the homes here are older, modest, single-story builds with a strong history of self-built additions and patios. That means our residential work often starts with understanding what’s already there, what was permitted, and what needs to be corrected before new construction can tie in.
Home Additions and Detached Structures
Home addition projects in Muscoy typically run $45,000 to $130,000 depending on square footage, foundation work, and whether prior unpermitted work needs to be legalized. Detached shops and garages fall into a similar planning category: we handle the county permit application, setbacks from wells and septic systems, and the grading plan the county will want to see on an open lot.
Garage Conversions and ADU Work
Garage conversions in Muscoy run $30,000 to $80,000, and the range depends heavily on what the county finds in the permit history. A garage that was converted to living space without permits will need as-built drawings, structural corrections, and inspection sign-off before we can take the project further. For full ADU construction, which runs $90,000 to $220,000 in this market, we work with prefab brands like Abodu when the lot conditions and county requirements make a factory-built unit the faster, cleaner option.
Trusted Brands We Service in Muscoy
We install and build with brands we’ve vetted over years of Inland Empire projects, and that means you’re not stuck with whatever the contractor happens to have in the yard. In Muscoy we’ve used Quikrete for slab and footing work on shops and ADU foundations, and we’ve specified Abodu for prefab ADU projects where county setbacks and lot shape made a factory-built structure the right call. We also stock local parts and common materials for the Muscoy area so a repair or small scope doesn’t wait on a shipment from the coast. For roofs, fences, and siding across these hot, wind-exposed lots, we choose materials rated for intense sun and Santa Ana gusts, not whatever’s cheapest on the rack.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Muscoy Homes
- Unpermitted owner-builder additions. A patio gets enclosed, a garage becomes a bedroom, and nobody filed a permit. We find this on a large share of Muscoy projects, and it changes the scope before any new work begins.
- Well and septic setbacks limiting building placement. On larger lots with private wells or septic systems, the county requires minimum distances from those systems to any new structure. That can shift an addition or ADU into a completely different part of the property.
- Poor grading and standing water after winter rains. Open lots with no drainage plan collect water against foundations and slabs. We scope grading and drainage into the quote, not as an afterthought when the punch list is already open.
- Roof tie-downs and wind exposure from Santa Ana conditions. Older Muscoy roofs often weren’t built for the wind load these foothill areas see. When we do a roof replacement or addition, we check and correct the tie-downs so the new work doesn’t fail in the first strong wind.
Pricing for General Contractor in Muscoy, CA
Building in Muscoy costs what it costs because of the specifics: county permits, lot size, setback compliance, and whether existing structures need legalization. Here’s what we see in the current Muscoy market for the projects homeowners ask about most:
| Project Type | Typical Muscoy Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Roof Replacement | $8,000 – $20,000 |
| Concrete Driveway Installation | $4,500 – $12,000 |
These are real, scoped ranges for Muscoy, not national averages. The biggest cost swings come from permit history on the existing structure, well and septic setbacks, and how much grading the open lot needs. Call (866) 505-5254 and we’ll walk the property, run the county permit search, and give you a written quote that holds up.
We Also Serve Cities Near Muscoy
If you’re in Muscoy or just outside it, we cover the surrounding area too. That includes San Bernardino, Rialto, Highland, and Crestline. The county permitting rules and lot conditions are similar across the unincorporated Inland Empire, so the same scoping process applies wherever your project sits.
Serving Muscoy, CA — Our Local Coverage Area
We’re based in the Muscoy area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About General Contractor in Muscoy
Yes. Muscoy is unincorporated San Bernardino County, so every addition, detached ADU, garage conversion, and structural change goes through county permitting, not a city building department. The county will require plans, setbacks from wells and septic systems, and inspections at multiple stages. We handle the entire permit process for you. Call (866) 505-5254 for a free estimate that includes the permitting scope.
Well and septic setbacks directly affect where you can build on a Muscoy lot, which changes foundation location, grading, and sometimes the size of the structure. The county requires minimum distances from private wells and septic tanks or leach fields to any new foundation. That can push an ADU or addition into a less convenient corner of the property or require longer utility runs. We check these setbacks during the first site visit so the quote reflects actual building placement, not a guess.
An ADU in Muscoy runs $90,000 to $220,000, and a home addition runs $45,000 to $130,000. Larger lots often mean more grading, longer material hauls, and deeper foundation work depending on soil conditions. If the lot has a well or septic system, setbacks add cost. Call (866) 505-5254 and we’ll give you an exact number for your specific parcel.
Yes, we do legalization work regularly in Muscoy. The process involves pulling as-built drawings, opening up walls or subfloors to verify the structural work, correcting anything that doesn’t meet county code, and then getting the structure through inspection sign-off. Only after that can we start new construction. We price the legalization scope separately so you know exactly what’s involved before signing.
We include a grading and drainage plan in the initial quote for any Muscoy project on an open lot. The county wants to see positive drainage away from foundations and no standing water after winter rains. We scope swales, slope adjustments, and sometimes retaining work before we pour slabs or set footings. Santa Ana winds and summer sun also inform our material choices, so the drainage and the structure both hold up through the seasons.
Written by Noel Cabrera, Owner at Daly City Construction, serving Muscoy and the surrounding Inland Empire with licensed general contracting, county permit handling, and full-scope residential construction.
Ready to build in Muscoy? Call (866) 505-5254 now and we’ll schedule your free on-site estimate. We’ll run the county permit search, walk the lot, and give you a written line-item quote before you commit to anything.